That's just a rhetoric that attempts to dismiss religion from being bad throughout history towards minorities. Yes, we should all just sit back and not acknowledge truth because humans can be bad by other ways.
If you want to discuss the evils of politicized religion, or state mandated religion then I’m all ears.
But religion is a convenient scapegoat for more simple truth: Without fail every movement, party, or group that gains influence sooner or later overreaches and becomes the oppressor.
Meaning you disagree, but you're neither willing to discuss, nor to "agree to disagree"?
I didn't catch anything overly uncivil in GP's answer, and they did present arguments and clarify their position, so I'd say this kind of reaction isn't warranted. I also don't think this extremely shallow dismissal does your views and opinions justice, but if you're not willing to engage in open-minded discussion, why not say nothing at all?